Milling jig



l,646,988 M. G. BERTHON MILLING JIG Oct. 25, 1927.

Original Filed June 20, 1923 2 Sheets-Sheet 1 Gum . m ww 0% M. G.BERTHON MILLING JIG- Original Filed June 20. 1923 2 eets-Sheet 2Swvemtoz of clearness.

Patented he. as, 1927.

intense burrs srrss earn basics.

MARCEL El. BEETHOH', F PRATT GITY, ALABAMA.

MILLING JIG.

ori inal application also June so, 1923, semi so. ceases. Divided and umapplication am June 12,

1925. Serial No. 38,634..

This invention relates to machine tools and aims to provide meanswhereby the depth of cut made on work pieces can be made to conform to apredetermined contour. The present application is a division ofapplication Serial No. 646,539 filed June 20,1923. An embodiment of theinvention is illustrated in the accompanying drawings in which- Fig. lis a top plan view showing a mlllmg jig and ageing of milling cuttersadapted to flute the work pieces carried by the ji Fig. 2 is a sideelevation with certain parts shown in vertical section in the interestReferring in detail to thedrawings, represents a carriage or table ofamillipg machine which is movable toward and.v away from the arbor 1: 3of a milling machine on which is carried a multiplicity of millingcutters 14 forming in sheet asingle gang cutter indicated as a whole bya numeral 16.

Adjustably secured to the carriage 10 of the milling machine is'asupporting member 80 provided with upwardly extending lugs 81 which forma bearing for trunnions 83 carried by a base member 18 which supports aturret 20, the latter being pivoted on a vertical spindle 22-and beingada ted to be clamped in position by bolts eew ich have heads on. theirlower ends fitting in the circular T-slot 42. The turret is formed witha pail-of upstanding bearing flanges 48 in which are mounted a pluralityof spindles 50. Each spindle carries a gear 52 which is keyed orotherwise secured to a reduced shank 54:. The several gears 52 carriedby the'spindle are in mesh and thus form a continuous train. Therefore,it one spindle is turned all the other spindles will be turned with it.One of the spindles is provided with an index disc 62 and the utter isprovided with suitableholes 64 and a spring plunger 66 is ada ted toenter selected holes so as to position the work' blanks for cuttinggrooves separated circumferentially by any predetermined distance. Thework'blauks C as shown in Fig. 2 are curved longitudinally from 0 to cthe intermediate point 0 being beyond astraight line joining thepoints cand 0 In order to make a out which is parallel to the longitudinalcontour of the blank, that is parallel to the lines a, c and c, Iprovide means for moving the blank relatively to the cutter in such away that the depth of out will be constant as the blank is fed towardthe cutter. This result is secured by means of cam members 86 which aredetachably secured by means of bolts 82 and 84 to the bearing flanges 49of the turret 20. Each cam member has jaws 88 and 90 whose surfaces 92and 94 are plotted so as to rock the base 18 and turret 20 in suchmanner that as the blanks 0 advance to the cutters, they will be somoved with respect to said cutters that the resulting cut is of uniformdepth and is parallel to the longitudinal contour of the blank. The jaws88 and 90 engage roll-- 'ing the turret with respect to the base 18marks 98 and 100 are provided which are adapted to be brought intoregister before the clamping bolts 44 are made fast.

have described with great particularity the details of the embodiment ofthe invention illustrated, it is not to be construed that I am limitedthereto as changes in arrangementand substitutiouof equivalents maybe'made by those skilled in the art without departing from the inventionas defined in the appended claims.

What I claim is:

l. The combination of a gang cutter and its supporting arbor of a jigcomprising a carriage movable toward and from said gang cutter, a baseadjustably secured to said carriage, a turret mounted .on saidbasecarrying separate gangs of work-supporting spin les, on opposite sidesof the turret, a horizontal pivot for said base and means coacting withthe cutter arbor for rocking vthe base on said horizontal pivot so as tomove the work blanks carried by said spindles relatively to said cutterso that an even depth of cut parallel to the longitudinal contour. ofthe blank can be secured.

2. The combination of a gangcutter with a jig comprising a carriagemovable toward aeaaeee and from said gang cutter, abase adjustablysecured to said carriage, a turret mounted on said base carryinsupporting 'spmd es, a horizontal pivot for said base,,a cam arranged toengage the cut.- ter carrying arbor to rock the, base and turret so asto move the Work blanks carried by said; spindles relatively to saidcutter so that an'even depth of cut parallel to the longitudinal contourof the blank can be secured separate gangs of -WOIk- 3. The. combinationwith a rotary cutter, of a jig comprising a carriage movable toward andfrom the cutter, a pivotally suported member carrying Work blanks, a camedly secured to said member arranged to coact With the cutter carryingarbor so as to rock said member and. control the contour and depth. ofcut produced.

In Witness whereof, I have hereunto signed my name.

MAROEL VG. BERTHON.

